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check if alpha or number only

My previous question. http://www.experts-exchange.com/Programming/Languages/.NET/Visual_Basic.NET/Q_27379919.html
How can I check to see if alpha or number only and the lenght is only 5?
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1 Solution
VBdotnet2005Author Commented:
something like this

If Regex.IsMatch(myString, "^[A-Za-z0-9]+$") Then  , but len can be up to 3 only
Carlos VillegasFull Stack .NET DeveloperCommented:
Regex.IsMatch(myString, "^[A-Za-z0-9]{1,3}$")

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Between 1 and 3 (your question said 5)
VBdotnet2005Author Commented:
thank you
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